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|Type:||Artigo de periódico|
|Title:||Prevalence of Delta F508 mutation in the cystic fibrosis transmembrane conductance regulator gene among cystic fibrosis patients from a Brazilian referral center|
|Abstract:||Objective: To verify the presence of Delta F508 mutation in the cystic fibrosis transmembrane conductance regulator gene among patients with cystic fibrosis diagnosed by the sweat test for sodium and chlorine and followed at the Pediatric Pneumology Outpatient Clinic of Universidade Estadual de Campinas, Brazil, a referral center for the treatment of cystic fibrosis. Methods: The study analyzed 167 DNA samples from cystic fibrosis patients. Patients' genotype was determined by polymerase chain reaction, and allele and genotype frequencies of Delta F508 mutation were calculated. Results: The genotype frequencies found for -/-, Delta F508/-, and Delta F508/Delta F508 genotypes were respectively: 43.7% (73 patients), 32.9% (55 patients), and 23.4% (39 patients). Of the 334 alleles analyzed, we observed a frequency of 201 (60.18%) alleles for the absence of Delta F508 mutation and of 133 (39.82%) for the presence of Delta F508 mutation. Hardy-Weinberg equilibrium was calculated, obtaining a chi-square value = 16.34 (p <= 0.001). The study population was out of equilibrium. The expected values for -/-, Delta F508/-, and Delta F508/Delta F508 genotypes were respectively: 32.22% (60.48 patients), 47.93% (80.04 patients), and 15.86% (26.48 patients). Conclusions: In the analyzed population, Delta F508 mutation was less prevalent than the allele without this mutation. The frequency observed in this study was similar to that from other areas in Brazil and in the world, mainly due to the predominantly Caucasian origin of the population included in the study. J Pediatr (Rio J). 2012;88(6):531-4.|
|Editor:||Soc Brasil Pediatria|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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